| abstract |
Provided is a spinel-type lithium manganese-containing composite oxide capable of improving output characteristics and life characteristics while suppressing gas generation with respect to a 5 V class spinel. A spinel-type lithium-manganese-containing composite oxide having an operating potential of 4.5 V or more at a metal Li reference potential, including at least Li, Mn, and O and two or more elements other than these, wherein D50 is 0.00. The value of (| mode diameter−D50 | / mode diameter) × 100 is 0 to 25%, and the value of (| mode diameter−D10 | / mode diameter) × 100 is 20 to 58%. Yes, the average primary particle diameter calculated from the SEM image and the average primary particle diameter / D50 calculated from the D50 is 0.20 to 0.99, and the spinel-type lithium manganese-containing composite oxide whose primary particles are polycrystalline Suggest things. |